Actue pancreatitis, pancreas stones inside the body, the ultrasound shows two stones inside the duct with incomplete sonic shadow (lower left), significant widening of the duct, the stones act as a valve - (upper left) CT-results, here the stones are especially well visible - (right) MRCP, here the stones are not visible, but the duct dilation is very well visible.
Source: Ultraschall im Netz (ultrasound on the net)